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@aient @twine lnited mes GEORGE W. LAD'D AND JOHN A. BROWN ,I OF PROVIDENCE, RHODE ISLAND, ASSIGNEES, BY MESNE ASSIGNMENTS, OF GEORGE W. LADD.

Letters Patent No. 65,579, dated June 11, .1867:` reissue No.13,417, dated Maly 4, `1869.

IMPROVED NIET-HOD QF MAKING- S IDE BANDS OF WATCH-CASES.

To all whomtt may concern:

Be it known that GEORGE W. LADD, of the cityand county of Providence, in the State of Rhode Island, has invented a new and useful Improvement in Side Bands for Watch-Gases; and it is hereby declared that the following specification, taken in connection with the drawings making a part of the same, is a full,

`article-itself as a manufacture.

The sideband is made up of three parts, a central portion, A, iig. 5, and two rims, B and C, figs. 4 and 8, one on each side of A, upon which are the sharp grooves into which the bevel or snapping-edge ofy the respective lids springs when the case is shut.

It is customary to finish the central band A with a milled surface, or otherwise ornament it, bythe. application of a revolving steel -dic,"pressed against the band, while the latter, held upon a mandrel, is revolving in a lathe.

i Heretofore these side bands have usually been made .with their accompanying rims B and O, by striking up .from sheet-metal, by means of suitable dies, each of the rims, with one-half of the centre band A, in one piece, and then` soldering two halves so made together, the joint in such case being in a plane midway between the edges of the band A.

When side bands so made are milled, or otherwise ornamentcd, as above described, the effect is to stretch the metal of the central portion A, andconsequently wring out of shape the lrims B and C, so that it is av matter of some diiculty, and-requiring much time and patience, to fit the lids or cases accurately thereto, and make a nice joint when the case is closed.

Thev present invention overcomes this dificnlty, by

` constructing the side bands in. three distinct parts, consisting of a centre band, A, g. 5, and the side rims B and 0, gs. 2, 4, 8, and 7.

Each of these parts is formed from wire of the'appropriate size, then bent into a hoop, and soldered at the joint.

Each part should then be formed, into shape by means of dies, and instead of making the rims B and O of the same diameter as the central -band A, they should be as lunch larger as the hand will stretch during the milling-operation.

After the band has been' milled and trued of in the lathe, the rims are then to be soldered to its sides.

The advantages which result from the method described of making the article are, that the halves of the. cases can be fitted with accuracy and dispatch to the side band, and make, when sprung into place by closing the case, perfect joints with the band.

The side band so produced is distinctive in its charf aoter as a manufacture. It admits of the employment of metals of di'erent qualities and grades of neness; as, for example, the central portion A, which is exposed to view, can be made of gold or silver, while the rims B and C'may be made of harder and cheaper composition-metal.

This capacity of being formed from metals of different qualities is most important and valuable in the manufacture of watch and like cases from base metal, overlaid or plated with gold or silver. A heavier plate can be used for the central portion A than is required for the side rims, which are subject to less wear, butthe article as a whole will be as durable, as beautiful, and practically as useful as if all its parts were made of equally costly stock.

What is claimed as the invention of the said GEORGE W. LADD, and is desired to be secured by Letters Patent isv 1. The method of constructing the side band for vwatch-cases, substantially as hereindescribed, for the purpose specified.

2. Aside. band for a watch-case, composed of a central band, A, and the side rims B and O, the article being of the character substantially as specified.

GEO. W. LADD, JOHN A. BROWN, c Assignees'of. George W. Ladd.

Witnesses:

BENJ. F. THUns'roN, C. W. GREENE. 

